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/*
* connection.h
*
* Copyright (C) 2009 Tim Marston <tim@ed.am>
*
* This file is part of sqlite3cc (hereafter referred to as "this program").
* See http://ed.am/dev/sqlite3cc for more information.
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SQLITE3CC_CONNECTION_H_
#define SQLITE3CC_CONNECTION_H_
#include <sqlite3.h>
#include <boost/utility.hpp>
#include <boost/shared_ptr.hpp>
#include <string>
namespace sqlite
{
namespace detail {
class basic_statement;
class basic_transaction;
}
class command;
class query;
class connection
:
private boost::noncopyable
{
//______________________________________________________________________________
// types
public:
/**
* Class to provide a scope lock for the connection mutex
*/
class mutex_guard
{
public:
/**
* Constructor that provides a connection upon which to act.
*
* @param connection reference to a connection
* @see sqlite3_db_mutex()
* @see sqlite3_mutex_enter()
*/
mutex_guard(
connection &connection );
~mutex_guard();
/**
* Release the mutex early.
*
* @see sqlite3_mutex_leave()
*/
void leave();
private:
sqlite3_mutex *_mutex;
};
//______________________________________________________________________________
// instantiation
public:
/**
* Constructor that specifies the filename of a database to open.
*
* @param filename the filename of the database file to open
* @throws database_error on error
*/
explicit connection(
const std::string &filename );
explicit connection();
virtual ~connection();
//______________________________________________________________________________
// public interface
public:
/**
* Open a database.
*
* @param filename the filename of the database file to open
* @param flags flags appropriate for sqlite3_open_v2()
* @returns an sqlite error code
* @see sqlite3_open_v2()
*/
int open(
const std::string &filename,
int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE );
/**
* Close an open database.
*
* @throws database_error on error
* @see sqlite3_close()
*/
void close();
/**
* Execute an SQL statement. An exception is thrown on error.
*
* @param sql an SQL statement in UTF-8
* @see sqlite3_exc()
*/
void exec(
const std::string &sql );
/**
* Sets a default busy handler which will wait for the specified number of
* milliseconds.
*
* @param duration number of milliseconds to wait
* @returns an sqlite error code
* @see sqlite3_busy_timeout()
*/
int busy_timeout(
int duration );
/**
* Create a command.
*
* @param sql an SQL statement in UTF-8
*/
boost::shared_ptr< command > make_command(
std::string sql );
/**
* Create a query.
*
* @param sql an SQL statement in UTF-8
*/
boost::shared_ptr< query > make_query(
std::string sql );
//______________________________________________________________________________
// implementation
private:
friend class detail::basic_statement;
friend class detail::basic_transaction;
friend class command;
friend class sqlite_error;
/** the connection handle */
sqlite3 *_handle;
};
} // namespace sqlite
#endif /* SQLITE3CC_CONNECTION_H_ */
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